Nope. I didn't say .02 is the margin of error. I said .02 is easily within the measurement error, which is absolutely true if you know how they're measured. In fact, .02 is an extremely conservative estimate -- the actual error is likely many times larger than that. If you weren't aware, the 40-yard-dash clock at the combine is done with partial electronic timing, which means the clock is stopped with a laser, but has to be started by hand. But humans are simply not capable of timing the push of a button consistently with accuracy down to a few hundredths of a second.
According to one source, 40-yard-dash times are expected to be, on average, about 0.2-0.24 seconds different when they eventually convert to full-electronic timing. That's ten times bigger than 0.02. Some reading: http://********.com/5988939/three-g...lded-receiver-actually-ran-a-419-40+yard-dash
And, even if you could measure a difference of 0.02 seconds with sufficient precision, it would still be inconsequential and virtually undetectable to the eye. Hardly the difference between "slow" and "not slow."
No, the point you're making is that Williams is "slow." That was your word, not anybody else's. Nobody's claiming he's Trindon Holliday.